Steering and Suspension Systems Components and Maintenance _4 wheels or more_ — Open Awards Occupational Qualification Motor Vehicle & Transport Revision
This subtopic covers the fundamental knowledge and practical skills required to identify, describe, and carry out routine maintenance on non-assisted steer
Topic Synopsis
This subtopic covers the fundamental knowledge and practical skills required to identify, describe, and carry out routine maintenance on non-assisted steering and suspension systems for vehicles with four or more wheels. Learners will develop an understanding of key components, their functions, and safe working practices essential for entry-level roles in the motor vehicle industry. Mastery of these basics is critical for ensuring vehicle stability, handling, and overall roadworthiness, aligning with industry health and safety standards and routine service schedules.
Key Concepts & Core Principles
- Workshop safety: Always use personal protective equipment (PPE) like safety glasses and gloves, and know the location of fire extinguishers and first aid kits.
- Basic hand tools: Identify and use spanners, sockets, screwdrivers, and pliers correctly – for example, always 'pull' a spanner towards you to avoid injury.
- Vehicle systems: Understand the main components of the engine, braking, steering, and electrical systems – for instance, the battery provides power to start the engine and run lights.
- Routine checks: Know how to check tyre tread depth (minimum 1.6mm), engine oil level (using dipstick), coolant level, and windscreen washer fluid.
- Manufacturer specifications: Always refer to the vehicle's handbook for correct tyre pressures, oil type, and service intervals – never guess.
Exam Tips & Revision Strategies
- Always refer to manufacturer-specific service data and torque settings during practical assessments to demonstrate professional competence.
- Use a systematic checklist approach when performing inspections to ensure no component is overlooked and to evidence thoroughness.
- Be prepared to explain the implications of worn suspension components on vehicle safety and tyre wear, as this shows underpinning knowledge.
- Practice identifying components on a range of vehicle types (front-wheel drive, rear-wheel drive, four-wheel drive) to handle varied exam scenarios.
- In written tasks, clearly link symptoms to causes, e.g., ‘steering wheel vibration at speed’ could indicate unbalanced wheels, worn tie-rod ends, or damaged dampers.
Common Misconceptions & Mistakes to Avoid
- Confusing steering and suspension components, such as mistaking a anti-roll bar for a steering linkage.
- Failing to secure the vehicle properly on axle stands before working underneath, leading to serious safety risks.
- Assuming all suspension systems use coil springs; ignoring other types like leaf springs or torsion bars commonly found on heavier vehicles.
- Over-tightening fasteners on suspension components without using a torque wrench, which can lead to premature failure or seized parts.
- Neglecting to check for play in wheel bearings during suspension inspection, which can mimic steering or suspension faults.
Examiner Marking Points
- Award credit for correctly identifying at least three key steering system components (e.g., steering wheel, steering column, rack and pinion) and explaining their primary function.
- Award credit for demonstrating safe working procedures, including proper use of PPE, vehicle lifting and supporting techniques, and isolation of systems before maintenance.
- Award credit for accurately describing the operational differences between a non-assisted rack-and-pinion steering system and a recirculating ball system.
- Award credit for successfully completing a routine steering system check, such as inspecting tie-rod ends for wear and assessing steering fluid levels where applicable.
- Award credit for correctly conducting a visual inspection of suspension components (springs, dampers, bushings) and identifying common faults like leaks, cracks, or excessive play.